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How to troubleshoot a Mercedes-Benz S-Class that lowers itself when parked?

In some cases, the car will drop itself overnight but not always. If the vehicle is parked on an incline or downhill the raising or lowering may stop working. There are many reasons lead to this malfunction. Mercedes-Benz with airmatic suspension tries to level itself when parked and end up with lowering near to the ground. But the vehicle may try to level itself unsuccessfully when one level sensor is broken, or the rod is bent. This may cause your Mercedes-Benz self-level too high or too low.

What’s the Symptoms?

The following problems may occur on Mercedes-Benz E, C, CLK, GL, S-Class

-You hear air compressor engaging when parked.

-Air compressor releases air when parked.

-Car lowers overnight, not always.

-Mercedes lowers drops on rear or front.

-Mercedes raises itself when parked

Cause

When the car is parked the airmatic will try to level the car. It does this by discharging air from the airmatic suspension strut that is too high. Typically the MaxiDAS DS708 is leveled by lowering the one or two corners of the car that are too high. We also have seen cases when an incorrect installation of the level sensor caused the airmatic trying to level the car by increasing air pressure at certain strut, therefore, raising the car to the maximum setting.

The cause of this problem is usually one of the level sensors. Each of these sensors has two hall effect sensors inside.

B22/8 Left Front Level Sensor

B22/9 Right Front Level Sensor

B22/3 Rear Axle Level Sensor

The two front level sensors are located at the air suspension struts. In some models, you will only find one sensor at the rear axle. In this case, it measures the position of the torsion bar which provides an average vehicle height for both rear wheels. Mercedes – suspension – airmatic – strut

The level sensors measure the current height of the vehicle, and those reading are stored on the airmatic control unit.

How to solve Mercedes-Benz raises or lowers when parked?

The level sensors measure the current height of the vehicle, and those reading are stored on the airmatic control unit.

So, you need to do:

1.inspect the level sensors first

1)Inspect the front level sensors.
make sure there is no bending of the arm, no damaged of the wires. If you performed any suspension repair ensure that the level sensor at the front airmatic strut is not installed backward.

2)Inspect the level sensor at the rear torsion bar.
Ensure the connecting rod is not bent.

2.If the sensors do not have any physical damage, your next step is to carry a vehicle level calibration.

you can pay to do level calibration in a workshop, or you can perform it yourself if you have a scanner capable of performing airmatic troubleshooting. You will need a scanner that provides similar capabilities to Mercedes Star Diagnostic and allows you to scan multiple control systems in your Mercedes-Benz including programming, actuating and calibrating sensors.

Below is how to access the airmatic control unit and calibration using the Autel MaxiDAS DS708 diagnostic scanner.

Step1: Choose vehicle information

It is communicating…

Step2: Pneumatic tests

Choose special functions->Pneumatic tests-> AIRmatic compressor unit

Test sequence

Go back to choose AIRmatic pressure release valve

Click OK to continue

Test result

Done!

These can work with most Mercedes-Benz equipped with airmatic suspension such as:

Autel MaxiDAS DS808 based on the Android operating system, MaxiDAS DS808 is featured with an extensive coverage of OE-level diagnostics. Installed with a fast quad-core processor, DS808 offers maximum convenience and efficiency for your diagnosis and analysis. The intuitive user interface makes using the device effortless through a 7-inch LCD touchscreen that displays at 1024 x 600 quality.

Based on the Android operating system, MaxiDAS DS808 is the update version of Autel DS708 which is featured with an extensive coverage of OE-level diagnostics. Installed with a fast quad-core processor, DS808 offers maximum convenience and efficiency for your diagnosis and analysis

Autel MaxiDAS DS808 Scanner Feature and Screen Display

How to update Autel DS808 software

1. Make sure the Display Tablet is connected to a power source with stable access to the internet.

2. Tap the Update application button from the MaxiDAS Job Menu;
or tap the update notification message when received one;
or tap the Update icon on Vehicle Menu in Diagnostics application.
The Update application screen displays.

3. Check all available updates:
If you decide to update all the items, tap the Update All button.
If you only want to update one or some of the item(s), tap the Update button on the right column of the specific item(s).

4. Tap the Pause button to suspend the updating process. When you tap Continue to renew the update, the updating process will resume
from the break point.

5. When the updating process is completed, the firmware will be installed automatically. The previous version will be replaced.

1. European vehicle list:
For AUDI, For BENZ, For BMW, For DACIA, For EU FORD
For LANDR OVER,For MINI, For OPEL, For PEUGEOT
For RENAULT, For SEAT, For SKODA, For VW,For VOLVO
For SMART, For JAGUAR, For BENZ SPRINTER, For SAAB,For FIAT
For ABARTH, For LACIA, For ALFA ROMEO, For VAUXHALL
For MAYBACH, For BENTLEY, For BUGATTI,For PORSCHE

2. USA vehicle vist:
For G/M, For CHRYSLER, For FORD

3. Asia vehicle list:
For SUZUKI, For KIA, For DAWEOO, For ISUZU, For TOYOTA, For SU/BARU,
For SCION, For NISSAN, ForMITSUBISHI, For LEXUS, For INFINITI,
For HYUNDAI, For HOLDEN, For HONDA, For ACCURA, For MAZDA.

1. Make sure the Display Tablet is connected to a power source with stable access to the internet.

2. Tap the Update application button from the MaxiDAS Job Menu;
or tap the update notification message when received one;
or tap the Update icon on Vehicle Menu in Diagnostics application.
The Update application screen displays.

3. Check all available updates:
If you decide to update all the items, tap the Update All button.
If you only want to update one or some of the item(s), tap the Update button on the right column of the specific item(s).

4. Tap the Pause button to suspend the updating process. When you tap Continue to renew the update, the updating process will resume
from the break point.

5. When the updating process is completed, the firmware will be installed automatically. The previous version will be replaced.

I have the first generation Autel Maxidas DS708 for many years, I love it because of its reasonable price and cost efficient function, but what a pity that it will not be updated any more.

Then you consider to have one Autel MaxiDAS DS808K full kit which adds extra special functions i.e injector coding, key coding, adaptation, ECU information, trouble codes, freeze frame, live data, active test and special functions. I have one small repair shop and have many different car brands fix, DS808 can fully meet my requirements.

It has many different vehicles’ diagnostic adapters which are not standard 16pin(see following pic). Maxidas DS808 is compatible to many US, European, Asian vehicles, user friendly and has software for different vehicle models and systems.

Its new CPU and LCD touch screen (7″ LCD 1024×600 resolution touch scrren), dramatically improved the entire users’experience, much more smooth comparing with DS708. Personally, I would recommend DS808 for those small shops with limit budgets. Of course, if money is not a problem, Maxisys Elite may be your good choice.It is smaller than ms906, so very handy.

Registering the device was easy. I simply go to autel’s website and set up an account. Once I do that I take the registration code/passcode from the scan tool and register it on the website. I then make sure that the scan tool is hooked up to my wifi which is setup in settings. Then I am ready to update the scan tool with the latest software.

Update Autel Maxidas DS808:

Make sure the Display Tablet is connected to a power source with stable access to the internet.

Tap the Update application button from the MaxiDAS Job Menu;or tap the update notification message when received one; or tap the Update icon on Vehicle Menu in Diagnostics application.

The Update application screen displays.

Check all available updates:

If you decide to update all the items, tap the Update All button.

If you only want to update one or some of the item(s), tap the Update button on the right column of the specific item(s).

Tap the Pause button to suspend the updating process. When you tap Continue to renew the update, the updating process will resume from the break point.

1.I think DS708 is the first generation of iconic device for Autel, because of its reasonable price and cost efficient function. I owned one DS708 for many years, but regret that it will not be updated any more. So I intended to add its new extended version- DS808 for my small repair shop, which can fully meet my requirements. Its new CPU and LCD touch screen, dramatically improved the entire users’ experience, much more smooth comparing with DS708. Personally, I would recommend this tool for those small shops with limit budgets. Of course, if money is not a problem, Maxisys Elite may be your good choice.

2.Actually I’m self-maintainer not a shop guy, I already have Diaglink but need more professional device, which can help me do some features as adaptation or Matching & lots of things. I do like MS908P but expensive, so I’m buying DS808, affordable price and good performance.

3.Compatible to my cars,it seems it is compatible to many US, European’Asian vehicles ,user friendly and has software for different vehicle models and systems. Very handy and has different adapters for the car models, I will use the equipment to scan and diagnose. Would recommend this product. Worth the money! And Motorzone send me a free headset.Sounds good.

Autel DS808 frequently-asked questions and answers:

Question: Can you use this to program new keys?

Answer: Yes you can reprogram keys with this tester

Question: can you program the abs module with this?

Answer: DS808 cannot program the abs module. Only maxisys pro can do it.

Question: Is it difficult to register this device? And can it support Spanish?

Answer: Registering the device was easy. You simply go to autel’s website and set up an account. Once you do that you take the registration code/passcode from the scan tool and register it on the website. You then make sure that the scan tool is hooked up to your wifi which is setup in settings. Then you are ready to update the scan tool with the latest software.

Changing the language settings is also easy. You simply do that in settings as well and have multiple different choices. I do know Spanish was one of them. I returned mine because it could not code or reset any adaptaions in any modules on my vehicles. My vehicles are about 15 years old and I think the support on older vehicles goes away with the updates. It probably has more capabilities on the newer vehicles. I should have purchased one of these 5 years ago and never updated it so that the scan tool could retain its capabilities.

Question: What is the head set used for with the scantool

Answer: It’s not used with the tool is just a free give away to get you to buy an outdated tool that according to autel there will be no more updates after Dec 2017. I sent it back because I couldn’t get it to update or more like it removed software during update which is another common complaint on their site. I feel it’s dishonest to sell things claiming a year full updates and it’s not a year is much less than a year but I guess China isn’t afraid of a class action for fraud.

The Update application allows you to download the latest released software. The updates can improve the MaxiDAS applications’ capabilities, typically by adding new tests, new models, or enhanced applications to the database.

The DS7808 Tablet automatically searches for available updates for all of the MaxiDAS software when it is connected to the internet. Any updates that are found can be downloaded and installed on the device. This section describes installing an update to the MaxiDAS System. A notification message displays if an update is available when the Notifications Center function is enabled in the Settings application

1.Navigation and Controls
Home Button – returns to the MaxiDAS Job Menu.
Update All – updates all available updates.
Search Bar – search specific update item by inputting the file name,
for example: a vehicle make.

2.Status Bar
Left Side – displays the MaxiDAS device model information and serial number.
Right Side – displays an update progress bar indicating the
completion status.

3.Main Section
Left Column – displays vehicle logos and update software version information.
Middle Column – displays a brief introduction about the new changes to the software operation or capabilities. Tap oi button to open an information screen to view more details, and tap the dim area around to close the window.
Right Column – according to the operation status of each software item, the button displays differently.

1.Make sure the Display Tablet is connected to a power source with stable access to the internet.

2.Tap the Update application button from the MaxiDAS Job Menu; or tap the update notification message when received one; or tap the Update icon on Vehicle Menu in Diagnostics application. The Update application screen displays.

3.Check all available updates:
If you decide to update all the items, tap the Update Allbutton.
If you only want to update one or some of the item(s), tap the Update button on the right column of the specific item(s).

4.Tap the Pause button to suspend the updating process. When you tap Continue to renew the update, the updating process will resume
from the break point.

5.When the updating process is completed, the firmware will be installed automatically. The previous version will be replaced.

How to update Autel DS808 firmware:
This option allows you to update the firmware of the Car Scanner Connect the scan tablet with the vehicle through DLC or use the mini USB cable for power supply. Follow the on-screen instructions to complete the operation. Internet connection is necessary for this operation.